Josh Berkus <[EMAIL PROTECTED]> writes: > Certainly the fact that MSSQL is essentially a single-user database makes > things easier for them.
Our recent testing (cf the "Xeon" thread) says that the interlocking we do to make the world safe for multiple backends has a fairly high cost (at least on some hardware) compared to the rest of the work in scenarios where you are doing zero-I/O scans of data already in memory. Especially so for index scans. I'm not sure this completely explains the differential that Gary is complaining about, but it could be part of it. Is it really true that MSSQL doesn't support concurrent operations? regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend